Power supply question for 3axis bopard

[tq9516pjm]

I purchased the "4AUPC Chopper Driver Board Kits"

THe website said "Control 3 Stepper Motors From Your Computers Printer Port! Ideal For Desktop Machining and Robots! Control Routers, Lathes, Mills, PCB Drillers, and Engravers! Just About Anything! "

What are folks using for a power supply for this board. The website siad i need to order a triadmagnetics transformer part no. F-401U, which i did.


The manufacturer so far has not been helpful at all. Cam amybody please offer some assistance? Thanks in advance.

[ger21]

Here's some info on building a power supply. http://www.campbelldesigns.com/how-t...wer-supply.php

[rippersoft]

If you haven't registered on Yahoo Groups for HobbyCNC, please do so. All of the support is really routed thru that forum. Many answers, files, pictures of HobbyCNC.

[HobbyCNC]

Originally Posted by tq9516pjm I purchased the "4AUPC Chopper Driver Board Kits" THe website said "Control 3 Stepper Motors From Your Computers Printer Port! Ideal For Desktop Machining and Robots! Control Routers, Lathes, Mills, PCB Drillers, and Engravers! Just About Anything! " What are folks using for a power supply for this board. The website siad i need to order a triadmagnetics transformer part no. F-401U, which i did. The manufacturer so far has not been helpful at all. Cam amybody please offer some assistance? Thanks in advance.

Sorry you feel "unhelped". Our website clearly states all customer support is handled thru our Yahoo hosted group. The order acknowledgement also stated this.

You asked us a question via the sales info email address and I promptly replied per the above.

If you live in Younges Island, SC then you purchased just the driver board and stepper combo, NOT the complete package that only requires the tranny and case.
Email us at dave@hobbycnc.com and we'll do one of two things:
1. Refund you complete purchase price upon the return our your order.
2. "Upgrade" your combo to a "package" for a nominal fee.

Dave Rigotti
HobbyCNC.com

[NC Cams]

To make things even EASIER as there may be a problem with regard to "following instructions" involved:

http://www.campbelldesigns.com/files...ply-part-1.pdf

The explanation is straight forward and can be modified to suit any number of voltages or currents IF ONE DOES/UNDERSTANDS THE MATH - a CLEAR pre-requisite for some DIY CNC projects....

[tq9516pjm]

Thanks NC!
I have a masters degree in chemical engineering so i think i can 'understand' the math (wink, wink).

;-)

[HobbyCNC]

I'l assume you are not going to respond to my earlier post???

Dave Rigotti
HobbyCNC.com

Originally Posted by tq9516pjm Thanks NC! I have a masters degree in chemical engineering so i think i can 'understand' the math (wink, wink). ;-)

[joecnc2006]

I had bought two boards from HobbyCNC and both times very happy, the second was a kit with the 200oz motors, and i went ahead and got the 4th axis from Dave, and he was very helpful. AAA service to me. Thats what is driving my CNC Model 2006 right now, and I cut MDF and HDPE at 80ipm.

joe

[tq9516pjm]

C'mon Dave,
You should know what you sell. It was a kit. I bought it a couple months back.

It says "Hobby CNC 4AUPC Rev2 unipolar Microstepping Copyright 2005"

You must know what you sell. I am trying to get a power supply to it and do not understand why you the recommended the one you did. Yes, i feel 'unhelped' - can you help, please?
Thanks.

[NC Cams]

Several things amaze me about the DIY CNC community.

1. People buy DIY electronic kits who don't know enough electronics to "do the math" when it comes to:

a. learning how to do basic calculations needed to construct power supplies, size resistors, figure out wire size, whatever. Simple basic "earth science" level math stuff.

b. Manufacturers make a sell kits that are poorly documented with recommended p/n's for the critical things need to make their kit work or to create what is needed to make it work.

c. anticipate that the DIY'er can't do even basic electronics design mods to adapt this into that... When you understand it, its simple, when you don't, it is like trying to read a foreign language.

d. Worse yet perhaps is that the manufacturers' engineers THINK for a minute that that the people will buy the kits are, first, educated enough to understand and do the math and, second, CAN and WILL take the time to do the math if they can.

If you make any of the above assumptions improperly, you are overestimating the technical skills and/or education level of your potential client base.

For those so inclinded, I've listed some links below that can be used by just about anyone who can "understand the math (wink wink" to size and create just about any size power supply that that they may need (if they pick the right components and proper sized transformer).

Linear P/S design/construction:
http://www.campbelldesigns.com/files...ply-part-1.pdf

Hmmm seems I already offered this hence I must be guilty of failing to consider assumption "d." above. How stooopid of me....

The other option is for the kit buyer to buy a P/S from the kit supplier in the first place. In that respect, the kit supplier should have pre-engineered one PROPERLY in anticipation of the less technically competent DIY'er when they decided to build and sell their DIY widget. If the mfg didn't engineer their DIY kit properly and/or failed to recommend an off the shelf P/S properly, they deserve whatever grief they get.

There's probably enough oversight to go around on both ends of the supplier chain in this instance - it usually works that way.

[bkukowski]

Last year, as a 17 year old high school junior with no formal electronics education I successfully built Dave's kit with no help. Just do some reading. Hint: you need a fuse, transformer, bridge rectifier, and electrolytic capacitor. His full kit includes everything with the exception of a transformer and case. I would recommend purchasing it.

[pminmo]

Simply stated, HobbyCNC wants to support it's products through it Yahoo group. I suspect that way he doesn't have have to search through all the cncgroups, bulletin boards, and their threads to find one of their users. Seems like a pretty simple straight forward request to me.